Octave: cleanup/restructure library files

- Restructure runtime code into declarations, function
  and class definitions, and initialisation code
- Rename internal functions/types to follow SWIG_Octave...
  or SwigOct... naming styles
- Style/comment/whitespace cleanups

Lib/octave/std_vector.i

@@ -1,19 +1,21 @@
-// Vectors
+//
+// std_vector.i - STL vector support
+//
 
-%fragment("StdVectorTraits","header",fragment="StdSequenceTraits")
+%fragment("StdVectorTraits", "header", fragment = "StdSequenceTraits")
 %{
   namespace swig {
     template <class T>
     struct traits_asptr<std::vector<T> >  {
       static int asptr(const octave_value& obj, std::vector<T> **vec) {
-	return traits_asptr_stdseq<std::vector<T> >::asptr(obj, vec);
+        return traits_asptr_stdseq<std::vector<T> >::asptr(obj, vec);
       }
     };
-    
+
     template <class T>
     struct traits_from<std::vector<T> > {
       static octave_value from(const std::vector<T>& vec) {
-	return traits_from_stdseq<std::vector<T> >::from(vec);
+        return traits_from_stdseq<std::vector<T> >::from(vec);
       }
     };
   }
@@ -23,4 +25,3 @@
 #define %swig_vector_methods_val(Type...) %swig_sequence_methods_val(Type);
 
 %include <std/std_vector.i>
-